How to explain a 4 year old, where do babies come from?

a 4 year old is too young to be told where babies really come from, so maybe you should take an age appropriate approach. my 4 year old asks this a lot, and the reason is that she loves to hear the story when she came to us from the fairy land. for her, babies live in the clouds with fairies in the fairyland, and then, when mamma papa are sad and want the baby, they bring the baby home. this is why babies and parents love each other so much - this is what i tell her :)